Do you ever wonder if someone is watching you? You may just have the uneasy feeling that someone is keeping tabs on you.

Or, maybe you have a good reason to worry. If you're at work, for instance, a lot of companies can, and do, keep a watchful eye on what you're up to. If you're online, that includes seeing which sites you're visiting and even the content of your emails.

Of course, you may have a more disturbing reason for wondering if you're being spied on if you've been stalked or you're having difficulty getting someone out of your life. One in five people has been cyberstalked, according to the National Cyber Security Alliance.

Fortunately, there's a very easy, free way to find out if you're being spied on online. SpyDetectFree is a simple download that you don't even need to install onto your device. When you want to find out if someone is spying, click on the Check Now button (see photo).